/*
 * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */
package javax.swing.plaf.nimbus;

import java.awt.*;
import java.awt.geom.*;
import java.awt.image.*;
import javax.swing.*;
import javax.swing.Painter;


final class SliderTrackPainter extends AbstractRegionPainter {

  //package private integers representing the available states that
  //this painter will paint. These are used when creating a new instance
  //of SliderTrackPainter to determine which region/state is being painted
  //by that instance.
  static final int BACKGROUND_DISABLED = 1;
  static final int BACKGROUND_ENABLED = 2;


  private int state; //refers to one of the static final ints above
  private PaintContext ctx;

  //the following 4 variables are reused during the painting code of the layers
  private Path2D path = new Path2D.Float();
  private Rectangle2D rect = new Rectangle2D.Float(0, 0, 0, 0);
  private RoundRectangle2D roundRect = new RoundRectangle2D.Float(0, 0, 0, 0, 0, 0);
  private Ellipse2D ellipse = new Ellipse2D.Float(0, 0, 0, 0);

  //All Colors used for painting are stored here. Ideally, only those colors being used
  //by a particular instance of SliderTrackPainter would be created. For the moment at least,
  //however, all are created for each instance.
  private Color color1 = decodeColor("nimbusBlueGrey", 0.0f, -0.110526316f, 0.25490195f, -245);
  private Color color2 = decodeColor("nimbusBlueGrey", 0.0055555105f, -0.061265234f, 0.05098039f,
      0);
  private Color color3 = decodeColor("nimbusBlueGrey", 0.01010108f, -0.059835073f, 0.10588235f, 0);
  private Color color4 = decodeColor("nimbusBlueGrey", -0.01111114f, -0.061982628f, 0.062745094f,
      0);
  private Color color5 = decodeColor("nimbusBlueGrey", -0.00505054f, -0.058639523f, 0.086274505f,
      0);
  private Color color6 = decodeColor("nimbusBlueGrey", 0.0f, -0.110526316f, 0.25490195f, -111);
  private Color color7 = decodeColor("nimbusBlueGrey", 0.0f, -0.034093194f, -0.12941176f, 0);
  private Color color8 = decodeColor("nimbusBlueGrey", 0.01111114f, -0.023821115f, -0.06666666f, 0);
  private Color color9 = decodeColor("nimbusBlueGrey", -0.008547008f, -0.03314536f, -0.086274505f,
      0);
  private Color color10 = decodeColor("nimbusBlueGrey", 0.004273474f, -0.040256046f, -0.019607842f,
      0);
  private Color color11 = decodeColor("nimbusBlueGrey", 0.0f, -0.03626889f, 0.04705882f, 0);


  //Array of current component colors, updated in each paint call
  private Object[] componentColors;

  public SliderTrackPainter(PaintContext ctx, int state) {
    super();
    this.state = state;
    this.ctx = ctx;
  }

  @Override
  protected void doPaint(Graphics2D g, JComponent c, int width, int height,
      Object[] extendedCacheKeys) {
    //populate componentColors array with colors calculated in getExtendedCacheKeys call
    componentColors = extendedCacheKeys;
    //generate this entire method. Each state/bg/fg/border combo that has
    //been painted gets its own KEY and paint method.
    switch (state) {
      case BACKGROUND_DISABLED:
        paintBackgroundDisabled(g);
        break;
      case BACKGROUND_ENABLED:
        paintBackgroundEnabled(g);
        break;

    }
  }


  @Override
  protected final PaintContext getPaintContext() {
    return ctx;
  }

  private void paintBackgroundDisabled(Graphics2D g) {
    roundRect = decodeRoundRect1();
    g.setPaint(color1);
    g.fill(roundRect);
    roundRect = decodeRoundRect2();
    g.setPaint(decodeGradient1(roundRect));
    g.fill(roundRect);
    roundRect = decodeRoundRect3();
    g.setPaint(decodeGradient2(roundRect));
    g.fill(roundRect);

  }

  private void paintBackgroundEnabled(Graphics2D g) {
    roundRect = decodeRoundRect4();
    g.setPaint(color6);
    g.fill(roundRect);
    roundRect = decodeRoundRect2();
    g.setPaint(decodeGradient3(roundRect));
    g.fill(roundRect);
    roundRect = decodeRoundRect5();
    g.setPaint(decodeGradient4(roundRect));
    g.fill(roundRect);

  }


  private RoundRectangle2D decodeRoundRect1() {
    roundRect.setRoundRect(decodeX(0.2f), //x
        decodeY(1.6f), //y
        decodeX(2.8f) - decodeX(0.2f), //width
        decodeY(2.8333333f) - decodeY(1.6f), //height
        8.705882f, 8.705882f); //rounding
    return roundRect;
  }

  private RoundRectangle2D decodeRoundRect2() {
    roundRect.setRoundRect(decodeX(0.0f), //x
        decodeY(1.0f), //y
        decodeX(3.0f) - decodeX(0.0f), //width
        decodeY(2.0f) - decodeY(1.0f), //height
        4.9411764f, 4.9411764f); //rounding
    return roundRect;
  }

  private RoundRectangle2D decodeRoundRect3() {
    roundRect.setRoundRect(decodeX(0.29411763f), //x
        decodeY(1.2f), //y
        decodeX(2.7058823f) - decodeX(0.29411763f), //width
        decodeY(2.0f) - decodeY(1.2f), //height
        4.0f, 4.0f); //rounding
    return roundRect;
  }

  private RoundRectangle2D decodeRoundRect4() {
    roundRect.setRoundRect(decodeX(0.2f), //x
        decodeY(1.6f), //y
        decodeX(2.8f) - decodeX(0.2f), //width
        decodeY(2.1666667f) - decodeY(1.6f), //height
        8.705882f, 8.705882f); //rounding
    return roundRect;
  }

  private RoundRectangle2D decodeRoundRect5() {
    roundRect.setRoundRect(decodeX(0.28823528f), //x
        decodeY(1.2f), //y
        decodeX(2.7f) - decodeX(0.28823528f), //width
        decodeY(2.0f) - decodeY(1.2f), //height
        4.0f, 4.0f); //rounding
    return roundRect;
  }


  private Paint decodeGradient1(Shape s) {
    Rectangle2D bounds = s.getBounds2D();
    float x = (float) bounds.getX();
    float y = (float) bounds.getY();
    float w = (float) bounds.getWidth();
    float h = (float) bounds.getHeight();
    return decodeGradient((0.25f * w) + x, (0.07647059f * h) + y, (0.25f * w) + x,
        (0.9117647f * h) + y,
        new float[]{0.0f, 0.5f, 1.0f},
        new Color[]{color2,
            decodeColor(color2, color3, 0.5f),
            color3});
  }

  private Paint decodeGradient2(Shape s) {
    Rectangle2D bounds = s.getBounds2D();
    float x = (float) bounds.getX();
    float y = (float) bounds.getY();
    float w = (float) bounds.getWidth();
    float h = (float) bounds.getHeight();
    return decodeGradient((0.25f * w) + x, (0.0f * h) + y, (0.25f * w) + x, (1.0f * h) + y,
        new float[]{0.0f, 0.13770053f, 0.27540106f, 0.63770056f, 1.0f},
        new Color[]{color4,
            decodeColor(color4, color5, 0.5f),
            color5,
            decodeColor(color5, color3, 0.5f),
            color3});
  }

  private Paint decodeGradient3(Shape s) {
    Rectangle2D bounds = s.getBounds2D();
    float x = (float) bounds.getX();
    float y = (float) bounds.getY();
    float w = (float) bounds.getWidth();
    float h = (float) bounds.getHeight();
    return decodeGradient((0.25f * w) + x, (0.07647059f * h) + y, (0.25f * w) + x,
        (0.9117647f * h) + y,
        new float[]{0.0f, 0.5f, 1.0f},
        new Color[]{color7,
            decodeColor(color7, color8, 0.5f),
            color8});
  }

  private Paint decodeGradient4(Shape s) {
    Rectangle2D bounds = s.getBounds2D();
    float x = (float) bounds.getX();
    float y = (float) bounds.getY();
    float w = (float) bounds.getWidth();
    float h = (float) bounds.getHeight();
    return decodeGradient((0.25f * w) + x, (0.0f * h) + y, (0.25f * w) + x, (1.0f * h) + y,
        new float[]{0.0f, 0.13770053f, 0.27540106f, 0.4906417f, 0.7058824f},
        new Color[]{color9,
            decodeColor(color9, color10, 0.5f),
            color10,
            decodeColor(color10, color11, 0.5f),
            color11});
  }


}
